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Equity and Convertible Debentures Financing (Details) (USD $)
0 Months Ended 1 Months Ended 6 Months Ended 0 Months Ended
Oct. 28, 2013
Oct. 31, 2013
Mar. 31, 2015
Jun. 01, 2011
Convertible debentures        
EQUITY AND CONVERTIBLE DEBENTURES FINANCING        
Repayments of Long-term Debt $ 140,000us-gaap_RepaymentsOfLongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
     
Debenture Purchase Agreement        
EQUITY AND CONVERTIBLE DEBENTURES FINANCING        
Gain (Loss) on Conversion of Convertible Instruments   119,000dlhc_GainLossonConversionofConvertibleInstruments
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
   
Income (expense) recorded related to change in the fair value of financial instruments     20,000us-gaap_FairValueAdjustmentOfWarrants
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
 
Debenture Purchase Agreement | Warrant        
EQUITY AND CONVERTIBLE DEBENTURES FINANCING        
Warrants issued to Debenture Purchasers (in shares)       53,846us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_FinancialInstrumentAxis
= us-gaap_WarrantMember
Debenture Purchase Agreement | Convertible debentures        
EQUITY AND CONVERTIBLE DEBENTURES FINANCING        
Aggregate principal amount of notes issued       350,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Class of Warrant or Right Adjusted Exercise Price of Warrants or Rights       $ 1.25dlhc_ClassOfWarrantOrRightAdjustedExercisePriceOfWarrantsOrRights
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Debenture Purchase Agreement | Common Stock | Convertible debentures        
EQUITY AND CONVERTIBLE DEBENTURES FINANCING        
Shares of common stock under conversion feature   168,000us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
   
Debenture Purchase Agreement | Warrant        
EQUITY AND CONVERTIBLE DEBENTURES FINANCING        
Warrants issued to Debenture Purchasers (in shares)   53,846us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
   
Class of Warrant or Right Adjusted Exercise Price of Warrants or Rights       $ 0.96dlhc_ClassOfWarrantOrRightAdjustedExercisePriceOfWarrantsOrRights
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Debt Instrument, Face Amount 210,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
     
Accrued liability with respect to the warrants   $ 61,000us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued
/ us-gaap_EnergyAxis
= dlhc_DebenturePurchaseAgreementMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember